Mozzarella is officially my favorite cheese. That’s because it’s what goes on top of my favorite food: Pizza.
Because I love pizza so much, I am very particular about the mozzarella I use. I prefer a very specific type of low-moisture, part-skim mozzarella that comes from a particular local supermarket because it has just the right hardness for grating, melts perfectly, pulls from the pie exactly the right way, and has the precise fresh taste that I enjoy most.
Over the years I’ve used all kinds of different types of mozzarella cheeses, both at home and in restaurants. For pizza, the best kind is low-moisture, part-skim that hasn’t been grated. It usually comes in a 16 oz. ball or log shape in a vacuum-sealed package.
The absolute worst kind you can use — and, ironically, the most common — is the pre-shredded mozzarella. This is the ubiquitous cheese you find hanging in plastic envelopes in any grocery store dairy case.
Unlike most other cheeses, mozzarella has a very high moisture content. So it doesn’t stay fresh for very long, especially after you grate it. Have you ever noticed that it will start to harden and curl up if you leave shredded mozzarella in the refrigerator overnight? Or that the cheese on frozen pizzas bears no resemblance to the freshly grated mozzarella used on a made-to-order pie?
Manufacturers of pre-shredded cheeses treat them with powders including corn starch, potato starch, and powdered cellulose, which is made from wood pulp that has been chemically treated to extract its fiber. These prevent the cheese from caking and also extend its shelf life. The result is a dull, dry, relatively tasteless cheese.
Believe it or not, many pizzerias, especially the big chains, use “bagged cheese” — the commercial equivalent of the grocery store variety — because of its convenience. But you can definitely taste the difference between a pizza made with freshly grated mozzarella and the-shredded kind.
Low-moisture, part-skim mozzarella is made from skim milk. If it hasn’t been grated will last at least a week in the refrigerator in its vacuum-sealed package. Once you open it, the cheese will lose its flavor quickly, so it’s a good idea to grate it and use it all right away.
I use a box grater and shred my mozzarella while the pizza dough is baking and the tomato sauce is simmering. This guarantees that all the fresh elements will be brought together at precisely the right moment for optimum flavor. (I’m a pizza freak, I know!)
Mozzarella that is made from the whole milk is softer and has a different flavor that low-moisture, part-skim variety. It’s the mozzarella you use for Insalata Caprese or to eat fresh, uncooked by itself. You can put it on pizza, but it has a wetter texture when it melts and lacks most of the appealing stringiness that makes pizza so delicious.
When you buy mozzarella made from whole milk, it usually comes in balls or ovals about the size of a tennis ball and soaking in brine. You also can get “ovallini”, which is the same cheese except formed into smaller balls about the size of large marbles.
In either case, ask that the deli attendant to add a little of the brine — after they weigh the cheese, of course — so that it will stay fresh longer in your refrigerator. Try to use it within a day or two for optimal flavor.
I’ve used buffalo mozzarella in high-end restaurant kitchens. Contrary to what most people think, it’s not made from the milk of the American buffalo — which has been pretty much killed off — but from milk taken from the domestic Italian buffalo, which is more like a water buffalo or ox. It’s flavor tends to be more defined and a little grassier, but it’s cost prohibitive for home use, at least for me.
Smoked mozzarella has a rich, smoky flavor. The smoking process evaporates more of the liquid so it has a harder texture, almost like a brie. It’s very nice as a spread or in a salad, but is not ideal for pizza.
Freshly grated mozzarella, either the low-moisture, part skim variety or the fresh kind — is ideal for topping pastas and is a key ingredient in any type of parmesan dish such as veal parmesan, chicken parmesan, eggplant parm, etc.
Really nice, durable high quality mozzarella can be found in most major supermarkets or grocery stores. Stay away from the pre-shredded variety and you should be in good shape.